Electronic tube



Aug. 9, 1938. K. SCHLESINGER 2,125,233

ELECTRONIC TUBE Original Filed June 15, 1934 June/rial:

Patented Aug. 9, 1938 PATENT OFFICE ELECTRONIC TUBE Kurt Schlesinger, Berlin, Radioaktiengesellschaft Steglitz, Germany Germany, assignor to D. S. Loewe, Berlin- Original application June 15, 1934, Serial No.

730,714. Divided and her 5, 1935, Serial June 17, 1933 2 Claims.

The object of the invention is an electronic tube, more particularly for rectifying and potential-amplifying purposes.

According to the invention, the electronic current produced by a hot cathode, preferably an indirectly heated equipotential cathode, is controlled on the one hand in the manner known per se by space charge control, and at the same time, additionally thereto, likewise in the manner known per se, by deflection (selection) control.

According to the invention there are provided means for controlling the anode current simultaneously by space charge control and by deflection control.

It is also possible, in accordance with the invention, to provide in an electronic tube of this character additional grids, such as space charge, screening and interception grids.

A form of embodiment of the tube according to the invention is illustrated diagrammatically by way-of example in the drawing.

In the drawing, l is the cathode, l are the preferably negativelybiassed control plates, 6 the screening grid plates, 1 is the anode and ill the 25 wall of the tube. 3 and II are additional grids.

'The elements t cause simultaneously a control of the emission and also a deflection of the emitted electrons. If the elements l are provided with a strong negative bias, the emitted electrons 30 will be bunched together at the centre and intercepted by the elements 6, so that no electrons impinge against the anode. If on the other hand the control potential is shifted into positive the electrons are able to pass between the elements 4 35 and the elements 3 and meet against the anode l.

The arrangement and embodiment of the elements 4 and 6 and also the biassing of these elements should be suitably selected for the particular purpose for which they are intended.

this application Decem- No. 52,956. In Germany This form of embodiment is particularly suitable as rectifier.

The invention is in no way limited to the form of embodiment illustrated, which has been quoted merely for the purpose of explanation.

The advantage of the arrangement according to the invention is to be regarded more particularly in the fact that the same permits of a very considerable increase in the steepness and an adaptation of the characteristic, practically as desired, to the particular purpose concerned.

I claim:

1. 'An electron-discharge device,preferably for rectifying purposes, comprising an evacuated container, a cathode, an anode structure, means for controlling the density of the electronic stream and for deflecting said electronic stream, said controlling means consisting of a plurality of plates radially arranged with respect to said cathode, and a plurality of further plates arranged between the first said plates parallel to said cathode, the width of each of said further plates being considerably smaller than the distance between every two adjacent ones of the first said plates.

2. An electron discharge device, preferably for rectifying purposes, comprising an evacuated container, a cathode, an anode structure, means for controlling the density of the electronic stream and for deflecting said electronic stream, said controlling means consisting of a plurality of plates radially arranged with respect to said cathode, and a plurality of further plates arranged between the first said plates parallel to said cathode, the width of each of said further plates being considerably smaller than the distance between every two adjacent ones of the first said plates, a grid surrounding said cathode.

KURT SCHLESINGER. 

